I once had to come up with a list of my favorite pieces from art history. The Sistine Chapel got tenth, Mystique from the X-Men movies got third.
If I were in a room designing the costume for a blue person and someone suggested making her naked and scaly, I would duck in cover for fear of stray objects bouncing off of them. But man, did it WORK. And as a kid, I didn’t even recognize that she was naked. It never registered for me, it just looked to natural and I didn’t question it. It also added a real raw sexual power to the performance. And they didn’t need any CGI to make it happen. Suck it Avatar.